English

Give Reason . a Person Suffering from Acidity is Advised to Take an Antacid. - Chemistry

Advertisements
Advertisements

Question

Give reason .

A person suffering from acidity is advised to take an antacid.

Advertisements

Solution

An antacid neutralizes stomach acidity.

shaalaa.com
  Is there an error in this question or solution?
Chapter 6: Chemical Reactions - Exercise 2 [Page 86]

APPEARS IN

Selina Concise Chemistry [English] Class 8 ICSE
Chapter 6 Chemical Reactions
Exercise 2 | Q 8.1 | Page 86

RELATED QUESTIONS

Changes in which new substances are formed are called ______ changes.


Complete and balance the following chemical equations:

Zn + `"H"_2"SO"_4`  `→`

           (dil)


Fill in the blanK

 A .............is a substance which changes the rate of a chemical reaction without undergoing a chemical change.


Write the missing reactants and products and balance the equations.

NaOH + ............... `→` NaCI + ...................


FILL IN THE BLANK

In a double decomposition precipitation reaction both the reactants must be ............ soluble.


Name the type of chemical reaction shown by the following equation:

2Mg + O2 → 2MgO


Name the type of chemical reaction shown by the following equation :

Fe2O3 + 2Al → Al2O3 + 2Fe


What is a chemical reaction?


Explain,giving one example of the following chemical changes:

Reversible reaction


State the original colour of the following substance and colour of residue obtained after heating.

Copper carbonate


Give examples of exothermic reactions i.e. heat evolved in each of the following:

(a) reaction between a solid and a liquid
(b) reaction between two gases
Give two examples of exothermic reactions seen in everyday life.


Give reason for the following:

Electrolytic decomposition of water is a reaction involving change of state.


Complete the table given below.

Heat on  Zinc nitrate Colour of residue  

State the following reaction represent oxidation or reduction.

\[\ce{Cu++->Cu}\]


Give a suitable example with an equation to show the representation of a chemical reaction.


Classify the following processes into physical or chemical changes:

  1. Beating of aluminium metal to make aluminium foil.
  2. Digestion of food.
  3. Cutting of a log of wood into pieces.
  4. Burning of crackers.

Give an example of a chemical reaction for the following situation:

A change in colour is observed


A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.

Write a word equation for the chemical change, if any.


Give an example where heat, light, and sound are produced during a chemical change.


Assertion (A): Cutting paper into very small pieces is an irreversible change.
Reason (R): Physical changes are always reversible.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×